a form of foreplay that is done by a male or a female. When a female performs oral sex to male, it usually involves the girl sucking the erected penis with her mouth. For a male to female oral sex, the guy lick on the girl's vagina or clitoris to stimulate pleasure. Oral sex is popular because the girl cannot get pregnant from consuming a guy's semen. Oral sex can also give pleasure that's comparable to an intercourse.